Bolt-threading machine.



A. B. LANDIS.

BOLT THREADING MACHINE.

APPLICATION FILED JAN.17.1911. RENEWED JAN. 24, 1014.

1,107,621 Patented Aug.l8,1914.

5 2 gluucufoz A. B. LANDIS.

BOLT THREADING MACHINE.

APPLICATION r1LE1 11111.17,1911. RENEWED JAN 24, 1914.

1,107,621, Patented Aug. 18, 1914.

4 SHBETSSHEET Z.

lvi twe ooac 61 5. fl/ ocz I @51 I A. B. LANDIS. BOLT THREADING MACHINE.

APPLICATION FILED JAN,17, 1911. RENEWED JAN. 24. 1914.

1,107,621. Patented Aug.18,1914.

4 SHEETS-SHEBT 3 A. B. LANDIS. BULT THREADING MACHINE. APPLICATION FILED11111.17, 1911. RENEWED JAN. 24. 1914.

1,107,621. Patented Aug. 18, 1914.

4 SHEETS-SHEET 4.

r r Z?" ABRAHAM B. LANDIS, OF EN FIELD, PENNSYLVANIA.

' BOLT-THREADING MACHINE.

Application filed January 17, 1911, Serial No. 603,125.

Specification of Letters Patent.

Patented Aug. 18, 1914. Renewed January 24, 1914. Serial No. 814,237.

To all whom it may concern:

Be it known that I, ABRAHAM B. LANDIS, a citizen of the United States,residing at Enfield, in the county of Montgomery and State ofPennsylvania, have invented certain new and useful Improvements in Bolt-Threading Machines, of which the following is a specification.

My said invention consists in certain improvements in the constructionand arrangement of parts of machines for forming threads on bolts,andlike parts, whereby such a. machine is provided by which the work maybe performed with great rapidity, and the construction of which iscomparatively simple and highly efficient, all aswill be hereinaftermore fully described and claimed.

Referring to the accompanying drawings which are made a part hereof andon which similar reference characters indicate similar parts, Figure 1is a. top or plan view of a bolt threading machine embodying my saidinvention, Fig. 2 a side elevation thereof as seen when looking in thedirection indicated by the arrows from the dotted line 22 in Fig. 1,Fig. 3 a side elevation thereof as seen when looking in the directionindicated by the arrows from the dotted line 3-3 in Fi 1 Fig. t an endelevation of a. *ortion of the machine, chiefly to illustrate the gearconnections more fully, and Fig. 5 a detail sectional view on the dottedline 5-5 in Fig. 1. v

In said drawings the portions marked A represent the frame or base ofthe machine, B the work-holding and feeding magazine, and C, C the dies.

The frame A is a casting of suitable dimensions and containing bearingsand seats a- 'ipropriately arranged to support the sev eral shafts andother parts of the mechanism./

The work holding and feeding magazine B is a circular rim mounted on aplate or disk B to which it is secured by screws or bolts 7). Said diskB is mounted on a hub B which in turn is journaled on a stud shaft 10.Said stud shaft 10 is mounted in an appropriate seat in a bracket. orarm, a

on the side-of base A. Hub B carries a gear-wheel B secured to rotatetherewith and said disk B is interposed between said gear-wheel and aplate B". Frictional contact plates 6 and 7) of fiber or other suitablematerial are mounted on opposite sides of said disk B between thesurfacesof gem wheel B and plate 13*, respectively, as shown mostclearly in Fig. l. A collar B is mounted on the outer end of hub B bymeans of a screw-threaded engagement, and a dished spring washer I) isinterposed between said collar and plate B", whereby said plate is heldunder spring pressure against said disk B and the parts thus held iutofrictional engagement. Plate B is held from turning on hub B by a pin 7)in hub B which engages with a radial notch in said plate. The rim B isformed with a series of notches it around its periphery, spaced :1suitable distance apart, into which the bolts l/V, or other articlesconstituting the work, may.be fed, as indicated most plainlyin Fig. i

The dies C and C are similar in formation, being hardened steel. groovesin their peripheries of the pitch de having cutting sired to be impartedto the work and mounted on shafts 11. and 12, respectively. Shaft 11 isjournaled in an eccentric sleeve A mounted in a perforation extendingthrough the base A, said sleeve being formed with a. threaded groove inits periphery with which a threaded adjusting screw a engages. Saidadjusting screw a is mounted in suitable bearings and extendstransversely across said sleeve A being formed 'with a flange a at oneend and a washer 61 held in place by a nut a at its other end to preventany longitudinal movement thereof. It is also formed with, an angularend a by which a wrench or other tool may be applied for the purpose ofturning it. By this means, as will be readily seen, the axis of shaft 11may be adjusted toward or from the axis of shaft 19. and the dies C andC thus fixed at the distance apart necessary for the size of work to beoperated upon. Said shaft 12 is mounted in fixed hearings in base A andits end carrying the die C extends beyond said die and has a pinion 13mounted thereon which is adapted to mesh with the teeth of gear-wheelB". Dies C and C are removably mounted on their arbors in any desired orapproved manner so that other dieshaving threads of dill'erent pitch maybe substituted from time to time as desired.

The machinev is driven from a single driving shaft 1 by means of apulley 15. connected with any convenient power. On said shaft 14-mounted a small gear 16 which meshes with a large gear 17 on shaft 12. A

- upon.

smaller gear 18 is mounted on said shaft 12 alongside gear 17 whichmeshes with an intermediate gear 19 on a eountershaft 20 which isjournaled in appropriate bearings on base A. The intermediate gear 19meshes with gear 21 on the shaft 11. Gears'18, 19 and 21 are of the samediameter which insures that dies G and G shall rotate in the samedirection, as indicated by the arrows in Fig. 3, and also make the samenumber of revolutions per minute. The engagement between pinion 13 andgear-wheel B also rotates said gear-wheel and through the frictionalengagement tends to carry the work-holding magazine in the directionindicated by the arrows in said figures. Die C is made of a diameterslightly larger than the diameter of die C olutions of the dies areequal the peripheral speed of die C is slightly in excess of that of dieC to insure the feed and rotation of the work after it has been grippedbet-ween the rotary dies.

- In operation the parts are arranged as shown in the drawings, the rimof the maga zine being arranged to pass between the dies C and C, itsthickness being less than the normal distance apart of said dies, orless than the thickness of the work of the smallest size which it isintended to operate The bolts or other parts constituting the work TVbeing placed in the magazine, as shown in Figs. 2 and 3, and the machinestarted in operation the magazine moves forward under the frictionalengagement between disk 13 and gear-wheel B until the first bolt isreceived betweenthe dies. Die C having a slightly greater peripheralspeed than that of die C, the bolt rolled between the dies and also feddownward through the space between them operating to roll into thesurface of the bolt threads of the pitch formed on the rotary dies.During the operation of rolling the threads into the work, gear-wheel.13 is constantly rotating, but the frictional connection with disk l3yields under the flexibility of spring washer Z) permitting the parts toslide over each other and the magazine ii 'to move only as fast as thework until said work has passed through between the dies and beendischarged, as indicated in Fig.

Immediately upon the discharge of one bolt,

the resistance being removed, magazine B, under the frictionalengagement with gearwheel B is immediately fed forward with a quietmovement until another bolt comes into the die and is operated upon in alike rectly from a single driving shaft.

so that while the rev-.

manner. vThus the bolts are fed to the die constantly and the magazinemoved quickly between operations to supply new Work to the die asrapidly as each pieceis finished and all parts of-the machine are drivendi-- The threads in dies C and C are of correspond-- ing pitch and theyare mounted on their shafts to cooperate in the formation of the threadson the work. The slight excess of peripheral speed of die C over that ofdie 0 is not sufficient to disturb the co6peration of said dies as tothe pitch of their grooves to any appreciable extent, but the differencein speed of roll the work and carry it through from the receiving sideto the discharge side of said die. 7

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent, is: l. A bolt'threading machinecomprising a base, rotary thread forming dies mounted on shafts in. saidbase and arranged to cooperate, a rotary work-carrying magazine arrangedto carry the Work between said dies, gearing for driving said dies alsogeared to drive said magazine, said magazine being connected to saidgear by a frictional connection, substantially as setforth.

2. A bolt threading machine comprismg a base, rotary thread formingdies. arranged die G is essential to to cooperate, a rotaryivoirlncariyingmagazine arranged to carry the work between said dies,gearing for driving said dies from a single shaft, said gearing alsoconnected to drive said work-carrying magazine, the connection betweensaid gearing and said magazine being formed to permit a slipping betweenthe parts, substantially as set forth.

3. A bolt threading machine comprising rotary thread fonning diesarranged to cooperzte, a rotary work-carrying magazine mounted to feedthe work between said dies, means for driving said dies constantly andat a unifonn speed, means for driving said work-carrying magazinevariably, and means for adjusting the dies toward or from ear-h other,substantially as set forth.

in witness whereof, I, have here-unto set any hand and seal at l lashington, District of Columbia this 13th day of January, A. D. nineteenhundred and eleven.

ABRAHAM B. LANDIS.

""lVitnessos J. D. Yoannnr,

ll. YV. Bnanronn.

